Utility Tools
Privacy-first, in-browser tools built across the OCXLY ecosystem — for AI, wellness, development, and creative work.
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Intelligence Utilities
Tools for language models, prompt engineering, and API cost analysis.
osoftly.com ↗LLM Cost Calculator
Compare API costs across GPT, Claude, Gemini, and other model price tiers. Enter token counts and see totals instantly — every price is editable.
Open Tool →Prompt Builder
Scaffold structured LLM prompts — role, task, context, examples, format, constraints — and export in plain, Markdown, or XML style.
Open Tool →Token Counter
Estimate LLM token usage for GPT and other models with a BPE-aware approximation — real pre-tokenisation plus byte-calibrated subword counting.
Open Tool →Base64 Encoder / Decoder
Encode plain text or files to Base64 and decode Base64 strings back — URL-safe mode and live conversion, all in-browser.
Open Tool →Wellness & Accessibility
Cognitive wellness, sleep, focus, and accessibility tools grounded in neuroscience.
cxneuro.com ↗Sleep Calculator
Calculate optimal wake times or bedtimes to align with your natural 90-minute sleep cycles and wake feeling rested.
Open Tool →BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see WHO category breakpoints with healthy-weight ranges for your height.
Open Tool →Developer Essentials
Precision tools for developers — formatting, regex, and text transforms.
ocxlydev.site ↗JSON Formatter
Format, validate, and beautify JSON with syntax highlighting and error detection — paste raw JSON and get it clean instantly.
Open Tool →Text Diff Checker
Compare two texts or documents line by line with word-level change highlighting, powered by the same Myers algorithm as Git. 100% browser-based, no uploads.
Open Tool →Password Generator
Strong random passwords or memorable EFF-wordlist passphrases, built from your browser's cryptographic randomness (Web Crypto) with a real bits-of-entropy meter. Never sent or stored.
Open Tool →Regex Tester
Live regex matching with real-time highlighting, capture groups, replace preview, flag toggles, and a JavaScript regex cheatsheet.
Open Tool →Case Converter
Convert text between 16 cases instantly — UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, kebab-case, slug, and more.
Open Tool →Writing & Productivity
Tools for time, focus, and everyday productivity.
Pomodoro Timer
Boost productivity with the Pomodoro technique — focused work intervals, strategic breaks, and session progress tracking.
Open Tool →Date & Age Finder
Calculate days between two dates, ISO week numbers, and exact age in years, months, and days — with flexible date format options.
Open Tool →Online Notepad
A distraction-free notepad that autosaves in your browser and works offline — live word count and download as .txt, Markdown, Word (.docx), RTF or HTML. Nothing is ever uploaded.
Open Tool →To-Do List
A simple, private to-do list that saves itself in your browser — add, check off, drag to reorder, filter, and export as .txt, Markdown, CSV, JSON or Word. No account, no server.
Open Tool →Writing & Publishing
Editorial tools for writers, editors, and publishers — drafts, documents, and typography.
bookstair.com ↗Markdown Editor
A distraction-free, live-preview Markdown editor with a syntax toolbar, export to HTML and .md, and auto-save.
Open Tool →Word Counter
Instantly count words, characters, sentences, and paragraphs. Perfect for writers, developers, and content creators with targets.
Open Tool →Readability Analyser
Score your text with Flesch, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI, plus a sentence-by-sentence difficulty map.
Open Tool →Lorem Ipsum Generator
Generate placeholder text in 5 flavours — Classic Latin, Tech, Space, Nature, Neuro — by paragraphs, sentences, words, or bytes. Export as text, HTML, or Markdown.
Open Tool →PDF to Word Converter
Convert PDF files to editable Word (.docx) documents entirely in your browser — no uploads, no server, full privacy. Preserves text and headings.
Open Tool →PDF Splitter
Split PDFs by page ranges or extract individual pages — 100% browser-based with no uploads, keeping your documents private.
Open Tool →PDF Merger
Combine multiple PDFs into a single document — reorder pages, drag-and-drop files, 100% browser-based with no uploads.
Open Tool →PDF to Image
Convert PDF pages to PNG or JPG images — choose resolution and page ranges, render in-browser with no uploads.
Open Tool →To Markdown Converter
Convert HTML, rich text, and documents to clean Markdown — preserves headings, lists, links, and code blocks. 100% in-browser.
Open Tool →Lesson Plan Generator
Generate structured lesson plans with objectives, materials, activities, and assessment — flexible templates for any subject or grade level.
Open Tool →Type Scale Generator
Generate harmonious typographic scales using musical ratios — preview heading and body sizes side by side and export CSS variables.
Open Tool →Math, Science & Calculators
Calculators and converters for science, mathematics, finance, and everyday measurement.
Scientific Calculator
Full scientific calculator with trigonometric, logarithmic, exponential, and power functions — degrees or radians, with calculation history.
Open Tool →Base Calculator
Convert numbers between Binary, Octal, Decimal, Hexadecimal, Base-32, Base-36, and any custom base 2–36 — with bit visualiser and reference table.
Open Tool →Unit Converter
Comprehensive converter across 20+ categories — length, mass, temperature, area, volume, speed, data, pressure, energy, and more.
Open Tool →Loan Calculator
Calculate monthly payments, total interest, and full amortisation schedules for any loan — mortgages, auto, or personal — with adjustable term and rate.
Open Tool →Graph Calculator
Interactive graphing calculator — plot up to 8 functions simultaneously, pan and zoom, trace values, and export. Supports sin, cos, tan, log, sqrt, abs and all standard math.
Open Tool →Images & Visual Media
Image, color, and visual-media tools for designers and content creators.
Image Compressor
Compress JPEG, PNG, and WebP images in your browser — adjust quality, resize, and convert formats with no uploads and full privacy.
Open Tool →EXIF & Metadata Remover
Strip GPS location, timestamps, and hidden EXIF/XMP metadata from JPEG, PNG, and WebP photos — losslessly, without re-compressing. Nothing leaves your device.
Open Tool →QR Code Generator
Turn any link, text, Wi-Fi login, or contact into a scannable QR code — custom colours, adjustable size, download as PNG or crisp SVG. Generated in your browser, never uploaded.
Open Tool →Watermark Generator
Add text or logo watermarks to your images — tile, diagonal, or single placement with adjustable opacity, size, and rotation. 100% browser-based, no uploads.
Open Tool →Colour Palette Generator
Generate palettes from any seed colour using 8 harmony rules — copy HEX/RGB/HSL and export as CSS variables, JSON, or SVG with 10-step shade scales.
Open Tool →Color Blind Test
A free 12-plate Ishihara-style screening for red–green color vision deficiency. Instant results, no signup, runs entirely in your browser.
Open Tool →Color Blindness Simulator
Simulate how designs appear to people with protanopia, deuteranopia, tritanopia, and other color vision deficiencies.
Open Tool →Contrast Checker
Check the contrast ratio between two colors against WCAG AA and AAA thresholds for accessible web and UI design.
Open Tool →JPG to PNG Converter
Convert JPG images to PNG with transparent or solid backgrounds — batch convert in your browser with no uploads.
Open Tool →Video Joiner
Join multiple video clips into a single file — drag, reorder, and merge in-browser with no uploads and full privacy.
Open Tool →Sound & Breath
Audio and breathing tools to ride the wave — focus, calm, and reset.
Focus Soundscape
Ambient soundscapes and binaural beats to enhance focus, meditation, and productivity — crafted for neurodivergent and deep-work sessions.
Open Tool →Breathing Timer
Animated breathing guide for box breathing, 4-7-8, the physiological sigh, coherent breathing, and extended exhale — with science-backed notes.
Open Tool →Play & Cognition
Interactive games and reaction challenges that test focus, speed, and strategy.
Galaxy Chess
Two-player live chess over a shared 5-digit key — create a game, share the code with your opponent, and play in real time.
Open Tool →Reaction Time Test
Measure how fast you respond to a visual cue across five rounds — get your average, best, and worst reaction times with percentile benchmarks.
Open Tool →Stroop Test
Measure attention and cognitive flexibility with the classic Stroop colour-word interference test — track accuracy and reaction time per trial.
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